Penny Marshall and Cindy Williams play feuding ex-TV partners on an episode of Nickelodeon's "Sam & Cat," but they brush aside any comparison to their past.

The former "Laverne & Shirley" stars, who back in the day of their 1976-83 sitcom were reported to have crossed swords, said they were never enemies and remain friends despite lingering suggestions to the contrary.

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"That was rumors. Any show you work on for eight years, you're gonna argue at some point," said Marshall. "Way overblown."

Williams agreed, but added a bit of detail.

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"Yes, it was a bit overblown," she said. The actress added that she and Marshall have "very different personalities" with contradictory styles of working, which sometimes led to on-set clashes.

That said, Williams regularly visits Marshall's house to watch and discuss TV. There's a chill in the air, Williams said, but only because Marshall keeps her thermostat turned down and, to compensate, provides down coats and blankets for guests.

Marshall, whose big-screen directing credits include "A League of Their Own" and "Big," is busy working on a documentary about provocative ex-NBA player Dennis Rodman. But she and Williams were enticed by "Sam & Cat" creator Dan Schneider to guest star on the comedy airing at 8 p.m. EST on Saturday.

In the episode, Sam (Jennette McCurdy) and Cat (Ariana Grande) face having to rename their baby-sitting business because it's similar to "Salmon Cat," a faux 1970s TV show. The young women track down the show's creators (Marshall and Williams) and try to dissolve their enmity.